Image forming apparatus and control method thereof

Abstract

An apparatus comprises an accommodation unit which accommodates a continuous printing sheet; a conveyance unit which conveys the printing sheet; a printing unit which performs image forming processing on the conveyed printing sheet; a cutting unit which cuts the printing sheet after completion of the image forming processing; and a processing unit which executes, when a printing sheet remaining on a conveyance path is detected, processing for removing the remaining printing sheet, the processing unit controls the conveyance unit to convey the printing sheet to detect a leading end, compares a first distance from the leading end to a portion located at a curl correction unit with a second distance from the leading end, which distance is required for image forming processing set, and sets a larger distance as a cutting position of the remaining printing sheet.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an image forming apparatus which performs an image forming operation on continuous printing sheet wound in a roll shape, and a control method thereof.[0003]2. Description of the Related Art[0004]Currently, a roll paper printer which performs an image forming operation on continuous printing paper wound in a roll shape (roll paper) has merits of high degrees of freedom in an output size (image forming length), low cost of roll paper, and the like. On the other hand, in the roll paper printer, since a curl unique to the roll paper is required to be removed, a printer engine includes a curl correction unit. In the roll paper printer, since the curl correction unit forms a curl in an opposing direction during the image forming operation, the curl unique to the roll paper is removed. The image-forming processed printing paper, the curl of which has been removed by the curl correction unit, is...

AI Technical Summary

Benefits of technology

[0012]The present invention has been made in consideration of the aforementioned problems, and realizes an image forming apparatus which can suppress wasteful use of sheet and deterioration of image forming quality in remaining sheet processing at an activation timing, and a control method thereof.

[0015]According to the present invention, wasteful use of sheet and deterioration of image forming quality can be suppressed in remaining sheet processing at an activation timing.

Problems solved by technology

When an electric power failure, forced termination, battery dead state, or the like has occurred during the image forming operation of the roll paper printer, and a power supply is stopped, paper in the middle of the image forming operation may remain in the printer engine.

When a power supply is turned on again from this state, an image forming operation may be unwantedly restarted from a position on the paper in the middle of the image forming operation.

When the image forming operation is restarted from the position on the paper in the middle of the image forming operation, not only image forming quality impairs, but also a peeling error of an ink sheet occurs in case of a thermal transfer printer, thereby causing jamming of the paper and ink sheet.

Images